| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a pressure-sensitive adhesive sheet which maintains a high adhesive force and adhesion reliability (particularly, repulsion resistance and holding power) when the sheet is bonded, and can be easily peeled off from an adherend to easily separate and dissociate a bonded portion when the sheet is peeled off from the adherend. <P>SOLUTION: The pressure-sensitive adhesive sheet is a pressure-sensitive adhesive sheet 16 having a pressure-sensitive adhesive layer 13 on at least one surface of a substrate, wherein the substrate is a heat-shrinkable film 15, and the pressure-sensitive adhesive layer is composed of a pressure-sensitive adhesive composition containing an acrylic copolymer and thermally expandable micro particles, the acrylic copolymer containing monomers (a1), (a2) and (a3) : (a1) an alkyl (meth)acrylate monomer having a 4-12C alkyl group and having a glass transition temperature less than 0°C when the monomer is formed into a homopolymer: 40-90 wt.%; (a2) a monomer having at least one nitrogen atom and one ethylenically unsaturated bond within the molecule: 5-40 wt.%; and (a3) a monomer having one ethylenically unsaturated bond within the molecule and having a glass transition temperature of not less than 0°C when the monomer is formed into a homopolymer: 0-40 wt.%. <P>COPYRIGHT: (C)2013,JPO&INPIT |
